Pacific Bluefin Tuna Fisheries in Japan and Adjacent Areas before the Mid-20th Century. Muto, F., Takeuchi, Y., & Yokawa, K. National Research Institute of Far Sea Fisheries, FRA, Japan Ochi, S. Institute for the Study of Japanese Folk Culture, Kanagawa University Tabuchi, M. Library and Fisheries Museum, National Research Institute of Fisheries Science, FRA
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Pacific Bluefin Tuna Fisheries in Japan and Adjacent Areas before the Mid-20th Century · 2018-06-12 · Pacific Bluefin Tuna Fisheries in Japan and Adjacent Areas before the Mid-20th
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Pacific Bluefin Tuna Fisheries in Japan and Adjacent Areas before the Mid-20th Century.Muto, F., Takeuchi, Y., & Yokawa, K.National Research Institute of Far Sea Fisheries, FRA, Japan
Ochi, S.Institute for the Study of Japanese Folk Culture, Kanagawa UniversityTabuchi, M.Library and Fisheries Museum, National Research Institute of Fisheries Science, FRA
Figs of gears : Kishinouye 1911, Watanabe 1978.
Prehistoric Tuna Catch, from BC 4,000
Figs of vertebrae : Aita 2007.
Harpoon Head
Harpoon Socket
Hook
Vertebrae, 5cm length
Image of Present Gear
Source:
Yamada & Takeuchi 2007
Recent Catch Statistics for PBF
And Past?
Source: Norin Tokei Kenkyukai 1978
Past statistics including all tuna species.
PBF Catch
PBF = Σ (PBF by Area)
= Σ (PBF Catch Records)
+ Σ (Estimated PBF by Area from TT)
Divide et impera.
+=
Finding PBF Catch Records -1
①
②
③
Industrial Statistics for Oshima Province.Skipjack and Tunas. All About Skipjack and Tunas.History of Japanese Fishing Vessels.History of Japan Tuna Ⅰ. Cooley 1946. Isahaya 1936, 1936. Ishida & Murata 1999. Iehisa 1940. Mine & Iehisa 1940. Nakamura 1939, 1940, 1943, 1951, 1965a, 1965b.Nakayama 1951. Muta 1941. Ota et al. 2005. Taiwan Sotokufu 1944, 1945. Yazaki 1943a-d.